# Difference Between Self Inductance And Mutual Inductance Pdf

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- Difference between Self induced & Mutually induced emf
- 14.2: Mutual Inductance
- What is difference between self inductance …

## Difference between Self induced & Mutually induced emf

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Definition: Self-inductance or in other words inductance of the coil is defined as the property of the coil due to which it opposes the change of current flowing through it. Inductance is attained by a coil due to the self-induced emf produced in the coil itself by changing the current flowing through it. If the current in the coil is increasing, the self-induced emf produced in the coil will oppose the rise of current, that means the direction of the induced emf is opposite to the applied voltage. If the current in the coil is decreasing, the emf induced in the coil is in such a direction as to oppose the fall of current; this means that the direction of the self-induced emf is same as that of the applied voltage. Self-inductance does not prevent the change of current, but it delays the change of current flowing through it. This property of the coil only opposes the changing current alternating current and does not affect the steady current that is direct current when flows through it.

## 14.2: Mutual Inductance

Swept Frequency Tech. Pulsed ET Tech. Self-Inductance and Inductive Reactance. The property of self-inductance is a particular form of electromagnetic induction. Self inductance is defined as the induction of a voltage in a current-carrying wire when the current in the wire itself is changing. In the case of self-inductance, the magnetic field created by a changing current in the circuit itself induces a voltage in the same circuit.

Thanks for visiting our website. Our aim is to help students learn subjects like physics, maths and science for students in school , college and those preparing for competitive exams. All right reserved. All material given in this website is a property of physicscatalyst. Mutual Inductance Table of Content Mutual Inductance Mutual Inductance of two co-axial solenoids Force between two long and parallel current carrying conductor Mutual Inductance Consider two coils 1 and 2 placed near each other as shown below in the figure Let coil 1 be the primary coil and coil 2 be secondary coil When current is primary coil changes w. This way as a result of mutual inductance emf is induced in both the coils If I 1 is the current in primary coil at any instant ,than the emf induced in secondary coil would be proportional to the rate of change of current in primary coil i. Where M is a constant known as coefficient of mutual induction and minus sign indicates that direction of induced emf is such that it opposes the change of current in primary coil Unit of mutual inductance is Henry We know that a magnetic flux is produced in primary coil due to the flow of current I 1.

In electromagnetism and electronics , inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it. The flow of electric current creates a magnetic field around the conductor. The field strength depends on the magnitude of the current, and follows any changes in current. From Faraday's law of induction , any change in magnetic field through a circuit induces an electromotive force EMF voltage in the conductors, a process known as electromagnetic induction. This induced voltage created by the changing current has the effect of opposing the change in current. This is stated by Lenz's law , and the voltage is called back EMF. Inductance is defined as the ratio of the induced voltage to the rate of change of current causing it.

## What is difference between self inductance …

The process in which a changing current in one coil induces emf in another coil, is called mutual induction. While the phenomenon in which a changing current in a coil induces an emf in itself is called self-induction. Consider two coils located near each other.

Inductance is the property of a device that tells us how effectively it induces an emf in another device. In other words, it is a physical quantity that expresses the effectiveness of a given device. When two circuits carrying time-varying currents are close to one another, the magnetic flux through each circuit varies because of the changing current I in the other circuit. Consequently, an emf is induced in each circuit by the changing current in the other.

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